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#include <Parsers/QueryParameterVisitor.h>
#include <Parsers/ASTQueryParameter.h>
#include <Parsers/ParserQuery.h>
#include <Parsers/parseQuery.h>
namespace DB
{
class QueryParameterVisitor
{
public:
explicit QueryParameterVisitor(NameToNameMap & parameters)
: query_parameters(parameters)
{
}
void visit(const ASTPtr & ast)
{
if (const auto & query_parameter = ast->as<ASTQueryParameter>())
visitQueryParameter(*query_parameter);
else
{
for (const auto & child : ast->children)
visit(child);
}
}
private:
NameToNameMap & query_parameters;
void visitQueryParameter(const ASTQueryParameter & query_parameter)
{
query_parameters[query_parameter.name] = query_parameter.type;
}
};
NameSet analyzeReceiveQueryParams(const std::string & query)
{
NameToNameMap query_params;
const char * query_begin = query.data();
const char * query_end = query.data() + query.size();
ParserQuery parser(query_end);
ASTPtr extract_query_ast = parseQuery(parser, query_begin, query_end, "analyzeReceiveQueryParams", 0, 0);
QueryParameterVisitor(query_params).visit(extract_query_ast);
NameSet query_param_names;
for (const auto & query_param : query_params)
query_param_names.insert(query_param.first);
return query_param_names;
}
NameSet analyzeReceiveQueryParams(const ASTPtr & ast)
{
NameToNameMap query_params;
QueryParameterVisitor(query_params).visit(ast);
NameSet query_param_names;
for (const auto & query_param : query_params)
query_param_names.insert(query_param.first);
return query_param_names;
}
NameToNameMap analyzeReceiveQueryParamsWithType(const ASTPtr & ast)
{
NameToNameMap query_params;
QueryParameterVisitor(query_params).visit(ast);
return query_params;
}
}
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